李成浩,毋亚文,姬中民,王海超

• 1:河海大学地球科学与工程学院
• 2:焦作师范高等专科学校理工学院
• 3:绍兴文理学院土木工程学院
• 4:新疆大学地质与矿业工程学院

摘要(Abstract)：

中国区域差异较大，煤层甲烷储层类型多样且地质条件较为复杂，已建立煤矿甲烷(CMM)排放量估算方法可能存在缺陷或并不能适用所有矿区。通过梳理CMM排放特征及其实际排放情况，发现甲烷预抽是造成大多数估算方法评估结果失准的重要原因，且预抽量和与年度煤炭产量并不直接相关。为此，将甲烷排放分为甲烷预抽和开采期间甲烷排放两部分展开研究。在此基础上，提出了一种估算CMM排放量创新方法。以焦作矿区演马庄矿为例，首先通过对预抽率与时间的相关性分析，建立了预抽甲烷量估算模型；特别引入采动影响因子(MAIF)来反映受采动影响周围煤、岩层甲烷释放情况。结合焦作煤田6个矿井甲烷排放情况进行验证，新估算方法误差分别仅为12.11%、9.23%、5.77%、-5.20%、-8.75%和4.92%。

关键词(KeyWords)： 甲烷排放;估算方法;采动影响因子;抽放;井工煤矿

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金“淮南煤层中H2S的赋存状态及其水溶液对煤储层的酸化增渗机制”(41902171)

作者(Author): 李成浩,毋亚文,姬中民,王海超

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